(2R,3R,4S,5S)-2-(4-Amino-3-bromo-pyrazolo[3,4-d]pyrimidin-1-yl)-5-hydroxymethyl-tetrahydro-furan-3,4-diol

4-amino-3-bromo-1-(2,3-O-isopropylidene-α-L-lyxofuranosyl)pyrazolo[3,4-d]pyrimidine

4-N-phenylamino-3-phenyl-1-(5-amino-5-deoxy-2,3-O-isopropylidene-α-L-lyxofuranosyl)pyrazolo[3,4-d]pyrimidine

3-phenyl-4-N-phenylamino-1-(2,3-O-isopropylidene-5-O-methanesulfonyl-α-L-lyxofuranosyl)pyrazolo[3,4-d]pyrimidine

(2R,3R,4R,5S)-2-(4-amino-3-bromo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-5-((benzoyloxy)methyl)tetrahydrofuran-3,4-diyl dibenzoate